[ntp:questions] no drift-file on 2008 R2 vps and the time diff. is getting bigger and bigger?

William Unruh unruh at invalid.ca
Sun Sep 14 10:29:27 UTC 2014

On 2014-09-14, gooly <gooly at gmx.at> wrote:
> Hi,
> Am 14.09.2014 10:29, schrieb Rob:
>> gooly <gooly at gmx.at> wrote:
>>> I can't fix the clock freq.-problem. It's a vps which probably shares
>>> the physical server with other vps.
>>> Is this a valid indicator that the provider should do a better load
>>> distribution because other run on their vps programs at 'full power'
>>> which 'steals' the clock interrupts?
>>> I guess I have to switch the provider.
>> When you have a VPS and you want the time synced, it is also possible
>> to have the provider do that for you.  They can change a setting in
>> their virtual machine setup (maybe you can even change it yourself)
>> to control the real time clock in your machine.
> Well initially I thought this and I complained that the clock was so 
> wrong - but I was told that this is up to me and so I started to 
> discipline this very unhasty or sleeping clock :(

>> When you want to sync it yourself, ntpd is not required at all, Windows
>> can do this itself.  Lookup the documentation for the windows time
>> service, you can configure it to use an external NTP server.
> I know! But w32tm is started to resync every x seconds. So it can happen 
> that  w32tm changes the time while I am logging which will disable a 
> later time-sort!
>> It is not very accurate, but when you require really accurate time
>> a VPS is not for you.  Really accurate time requires a physical machine
>> and another operating system than Windows.
> But I can insist to require a clock with an offset less than 1 second 
> per hour or per 2 hours - no?

Insist to whom? I doubt that your provider feels that is their
obligation. Nor that he deliver a monotonic, non-jumping clock to you.
And ntp cannot discipline a clock which it decides is off by more than
500PPM as averaged over a number of cycles.

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